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Optics Letters

Coherent population trapping resonances in a thermal 85Rb vapor: D1 versus D2 excitation

Markus Stähler, R. Wynands, Svenja A. Knappe, John E. Kitching, Leo W. Hollberg, A. V. Taǐchenachev, Valeriy I. Yudin

Published Jan 1, 2002• 6 citations
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We have compared coherent population trapping (CPT) resonances, both experimentally and theoretically, for excitation of the D(1) and D(2) transitions of thermal (85)Rb vapor. Excitation of the D(1) line results in greater resonance contrast than excitation of the D(2) line and in a reduction in the resonance width, in agreement with theoretical expectations. These results translate into a nearly tenfold improvement in performance for the application of CPT resonances to a frequency standard or a sensitive magnetometer when the D(1) line, rather than the D(2) line, is used.

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In our recent Letter,(1) Ref. 12 was printed incorrectly. The correct reference is M. Zhu, Coherent population trapping-based frequency standard and method for generating a frequency standard incorporating a quantum absorber that genrates the CPT state with high frequency, U.S. patent 6,359,916 (March 19, 2002).

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We have compared coherent population trapping (CPT) resonances, both experimentally and theoretically, for excitation of the D(1) and D(2) transitions of thermal (85)Rb vapor. Excitation of the D(1) line results in greater resonance contrast than excitation of the D(2) line and in a reduction in the resonance width, in agreement with theoretical expectations. These results translate into a nearly tenfold improvement in performance for the application of CPT resonances to a frequency standard or a sensitive magnetometer when the D(1) line, rather than the D(2) line, is used.